contrib/plan9/mkfile

exchange: support declaring pull depth

Upcoming commits will teach exchangev2 how to perform a shallow
clone. This commit teaches hg.clone(), exchange.pull(), and
exchange.pulloperation to recognize a request for a shallow clone
by having the caller specify a numeric depth of the maximum number of
ancestor changesets to fetch.

There are certainly other ways we could control shallow-ness. But this
one is simple to implement and is also how the narrow extension
controls things. So it seems to make sense to start here.

Differential Revision: https://phab.mercurial-scm.org/D5136

APE=/sys/src/ape
<$APE/config

PYTHON=python
PYTHONBIN=/rc/bin
SH=ape/psh

PURE=--pure
ROOT=../..

# This is slightly underhanded; Plan 9 does not support GNU gettext nor
# does it support dynamically loaded extension modules. We work around
# this by calling build_py and build_scripts directly; this avoids
# additional platform hacks in setup.py.
build:VQ:
	@{
		cd $ROOT
		$SH -c '$PYTHON setup.py $PURE build_py build_scripts'
	}

clean:VQ:
	@{
		cd $ROOT
		$SH -c '$PYTHON setup.py $PURE clean --all'
	}

install:VQ:	build
	@{
		cd $ROOT
		$SH -c '$PYTHON setup.py $PURE install \
			--install-scripts $PYTHONBIN \
			--skip-build \
			--force'
	}
	mkdir -p /lib/mercurial/hgrc.d
	dircp hgrc.d /lib/mercurial/hgrc.d/
	cp 9diff /rc/bin/